WO2011090335A2

WO2011090335A2 - Fluid pump and fluid-pumping method for same

Info

Publication number: WO2011090335A2
Application number: PCT/KR2011/000418
Authority: WO
Inventors: 최기호
Original assignee: Choi Ki Ho
Priority date: 2010-01-21
Filing date: 2011-01-21
Publication date: 2011-07-28
Also published as: WO2011090335A3; KR20110085593A

Abstract

The present invention relates to a fluid pump. The fluid pump of the present invention comprises a pumping housing, a rotating member, a plurality of pistons, and a cam member. The pumping housing includes an inlet portion for introducing fluid, an outlet portion for discharging the pumped fluid, and an accommodating portion interposed between the inlet portion and the outlet portion to put the inlet portion and the outlet portion in communication. The rotating member is tightly accommodated in the accommodating portion of the pumping housing, and has a plurality of cylinder holes which are in turn in communication with the inlet portion and the outlet portion during rotation. The plurality of pistons are inserted into the respective cylinder holes of the rotating member such that the pistons are movable in the upward and downward directions, and has a communication space for putting the rotating member and the pumping housing in communication. The cam member enables the plurality of pistons to move in the upward and downward directions, such that the volume of the communication space in communication with the inlet portion increases and the volume of the communication space in communication with the outlet portion gradually decreases during the rotation of the rotating member. A rotating means rotates the rotating member.

Description

[Correction 14.03.2011] under Rule 26. Fluid pumps and their pumping methods

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid pump, and more particularly, to a fluid pump for transporting a fluid through a tube by a pressure action or for transporting a fluid in a low pressure vessel into a high pressure vessel through the tube.

A fluid pump is a machine that transports a fluid through a tube by pressure action, or pumps a fluid in a low pressure vessel into a high pressure vessel through the tube.

Among the fluid pumps, gear pumps may be applied to pump small, high pressure fluids. The gear pump utilizes the movement of the space generated between the groove of the tooth and the circumferential wall by putting the two gears engaged with each other in a case circumscribed to the gears. The gear pump has a low flow rate but a pressure of 25 to 30 MPa. The gear pump has two types of structures, an outer meshing gear and an inner meshing gear.

However, the gear pump wears due to friction between the teeth. For this reason, there is a problem that the discharge pressure is lowered during long-term use.

In addition, fluid foreign matter may be inserted between the teeth and may not be removed. Accordingly, the suction force of the fluid is weakened.

As a result, there is a limit in discharging the fluid at a higher pressure.

Disclosure of Invention The present invention has been made to solve various problems including the above problems, and an object of the present invention is to provide a fluid pump having a structure capable of discharging fluid at high pressure due to excellent suction power of the fluid.

Another object of the present invention is to provide a fluid pump having a structure excellent in durability of the pump.

Accordingly, the fluid pump according to the present invention includes a pumping housing, a rotating member, a plurality of pistons, and a cam member.

The pumping housing includes an inlet, an outlet, an accommodating portion, a rotating member, a cam member, and a rotating means. Fluid enters the inlet. The discharge part discharges the pumped fluid to the outside. The receiving portion is interposed to communicate between the inlet and outlet. The rotating member is tightly received in the receiving portion of the pumping housing. A plurality of cylinder holes are formed in the rotating member. The cylinder holes communicate with the inlet and outlet in order as the rotating member is rotated. A plurality of pistons are inserted into each of the cylinder holes of the rotating member to be lowered, so that the rotating member has a communication space in communication with the pumping housing. The cam member controls the volume of the communication space communicated with the inlet to increase while the rotating member rotates, and raises and lowers the plurality of pistons so that the volume of the communication space communicated with the outlet becomes smaller. The rotating means rotates the rotating member.

In this case, an inflow communication hole and a discharge communication hole are formed in the bottom of the receiving part of the pumping housing. The inflow communication hole and the discharge communication hole are disposed to face each other with respect to the center of the accommodating portion and communicate with at least one cylinder hole. Preferably, the inlet of the pumping housing includes an inlet formed on one side of the pumping housing and an inlet passage passing between the inlet and the inlet communication hole. In addition, the discharge portion of the pumping housing, it is preferable that the discharge port formed on the other side of the pumping housing and the discharge passage passing between the discharge port and the discharge communication hole.

In addition, each of the pistons is formed with a groove for the cam formed along the circumference. In this case, the cam member is fitted into each of the cam grooves of the piston, and is coupled to be inclined to the rotating member. Accordingly, the pistons can be raised and lowered in accordance with the height of the cam member. In this case, it is preferable that the cam member has a hollow disk shape in which a portion corresponding to the inflow portion is inclined toward a higher side and a portion corresponding to the discharge portion is inclined to a lower side.

On the other hand, it is preferable that the respective cylinder holes do not communicate with each other.

According to the present invention, by pushing and ejecting a high pressure fluid while raising and lowering the plurality of pistons, friction between the gears and foreign matters do not occur. This results in excellent durability.

In addition, by operating by the suction motion and the expansion motion of the piston, it is possible to discharge the high-pressure fluid by having a strong suction force and the earth output.

1 is a perspective view showing a fluid pump according to a preferred embodiment of the present invention.

2 is an exploded perspective view of FIG. 1.

3 is a cross-sectional view taken along line III-III of FIG. 1.

4 is a view showing the shape of the cam member.

5 is a view illustrating an inflow communication hole, a discharge communication hole, and a piston of the pumping housing of FIG. 1 from above.

FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5.

FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. 5.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view illustrating a fluid pump 100 according to a preferred embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1.

As shown in FIGS. 1 to 3, the fluid pump 100 includes a pumping housing 110, a rotating member 120, a plurality of pistons 130, a cam member 140, and a rotating means ( 150).

The pumping housing 110 includes an inlet 111, an outlet 114, and a housing 117. The working fluid is introduced through the inlet 111. The pumped working fluid is discharged through the discharge part 114. The receiving unit 117 is interposed to communicate the inlet 111 and the outlet 114. Accordingly, the working fluid is pumped through the inlet 111, the accommodating part 117, and the discharge part 114 and discharged to the outside.

The rotating member 120 is tightly received so as to be rotatable within the accommodating part 117 of the pumping housing 110. The rotating member 120 is formed with a plurality of cylinder holes 123 along the circumference. As the rotating member 120 rotates, the cylinder hole 123 is formed at a position in communication with the inlet 111 and also at the outlet 114.

The plurality of pistons 130 are inserted into the cylinder hole 123 of the rotating member 120. The piston 130 can be raised and lowered. Accordingly, the volume of the space between the lower surface of the cylinder hole 123 and the lower surface of the piston 130 is controlled.

The cam member 140 is inserted into the accommodating part 117 of the pumping housing 110, and is arranged to lift up and down the plurality of pistons 130. In this case, the cam member 140 increases the volume of the communication space communicated with the inlet 111 while the rotary member 120 rotates, and at the same time the communication member communicates with the outlet 114. The plurality of pistons 130 are raised and lowered so that the volume becomes smaller.

The rotating means 150 rotates the rotating member 120 in the accommodating part 117 of the pumping housing 110. The rotation means 150 may include a rotation motor 151 and a rotation shaft 152. In this case, the rotating shaft 152 transmits the rotating force of the rotating motor 151 to the rotating member 120. The rotary motor 151 is coupled to the pumping housing 110.

The rotating member 120 has an insertion groove 120h coupled to the rotating shaft 152 at the central axis of the rotating member 120, and the pumping housing 110 communicates with the center of the rotating member 120. And a through hole 110h into which the rotation shaft 152 is inserted. The rotating shaft 152 is coupled to the rotating member 120 by the fixing means 153, thereby rotating in conjunction with each other.

According to the present invention, the fluid is introduced into the fluid pump 100 through the plurality of communication spaces (A). That is, the fluid is sucked by using the pressure difference between the outside and the communication space.

In addition, the fluid in the communication space is discharged out by using the piston (130). That is, when the piston 130 is lowered to reduce the communication space, the pressure of the communication space is increased. Accordingly, a pressure difference occurs between the communication space and the outside, thereby allowing the fluid to be discharged at a high pressure.

That is, by not using the internal gear or the external gear device, wear and the like that occur while the gears are engaged do not occur. In addition, by using the piston 130 can completely discharge the fluid in the communication space, it is possible to pump the high pressure. In addition, by using the plurality of piston 130, it is possible to pump the fluid of high pressure by operating the piston 130 with a small force.

In this case, it is preferable that the fluid is not present in the accommodation portion 117 of the pumping housing 110 except the cylinder hole 123. That is, it is preferable that all of the fluid through the inlet 111 is sucked by the retraction operation of the piston 130 and discharged by the forward operation of the piston 130. This rotation member 120 is formed in close contact with the pumping housing 110, it is preferable to prevent the fluid from moving through the bottom of the rotating member 120.

On the other hand, the side of the receiving portion 117 of the pumping housing 110 is preferably formed to be stepped so that the seating surface 161 on which the cam member 140 is seated.

An inflow communication hole 118 and a discharge communication hole 119 disposed to face each other with respect to the center of the accommodation part 117 may be formed at a bottom of the accommodation part 117 of the pumping housing 110. . The inflow communication hole 118 and the discharge communication hole 119 has an arc shape, is formed directly below the cylinder hole 123 formed in the rotating member 120 accommodated in the pumping housing 110, In communication with the cylinder hole 123, respectively.

In this case, in particular, as shown in Figure 3, the inlet 111 of the pumping housing 110, the inlet 112 and the inlet 112 formed on one side of the pumping housing 110 and the inlet It may include an inflow passage 113 penetrating between the communication hole 118. In addition, the discharge part 114 of the pumping housing 110 penetrates between the discharge port 115 formed on the other side of the pumping housing 110, the discharge port 115 and the discharge communication hole 119. May include a discharge passage 116.

Meanwhile, the cam grooves 135 formed along the circumference of the piston 130 may be formed. The cam member 140 is fitted into the cam groove 135. Accordingly, the piston 130 is located high or low depending on the height of the cam member 140 fitted thereto. The cam member 140 is disposed to be inclined to the rotating member 120. Accordingly, the height of the piston 130 is formed differently.

In this case, the cam member 140, as shown in Figure 4, the inlet plate portion 141 corresponding to the inlet portion is inclined toward the higher gradually, the discharge plate portion 144 corresponding to the outlet portion ) May be a hollow disc shape having a shape that is inclined toward an increasingly lower side.

That is, the cam member 140 is formed to fit in the cam groove 135 along the outer circumferential surfaces of the pistons 130. In this case, the outer periphery of the cylinder hole 123 of the rotating member 120 may be formed to be lower than the inner periphery of the cylinder hole 123 so that the cam hole is exposed.

5 to 7, the operation example of the fluid pump 100 of the present invention will be described. FIG. 5 is a view schematically showing one piston 130 moving along the inlet communication hole 118 and the outlet communication hole 119 in the pumping housing, and FIG. 6 is a line VI-VI of FIG. 5. 7 is a cross-sectional view taken along the line VII-VII of FIG. 5.

First, as shown in FIGS. 5 and 6, at least one of the cylinder holes disposed in the rotating member is the start portion 118a of the inflow communication hole 118 disposed on the lower surface of the accommodating portion 117 of the pumping housing 110. ) To communicate with. The inflow plate portion of the cam member is inclined so as to gradually increase from the start portion 118a of the inflow communication hole to the end portion 118b. Therefore, the piston 130 accommodated in the cylinder hole is gradually increased in accordance with the inclination of the cam member as the rotating member rotates. Accordingly, the fluid stored in the fluid tank is filled in the communication space (A) through the inlet, the inlet passage and the inlet communication hole 118 by the pressure difference.

After that, the rotating member is continuously rotated through the rotating means so that the piston is positioned at the position of the start portion 119a of the discharge communication hole 119.

Thereafter, as shown in FIGS. 5 and 7, by rotating the rotating member, the piston rotates from the start portion 119a to the end portion 119b of the discharge communication hole 119. The discharge plate portion of the cam member is inclined so as to gradually lower from the start portion 119a of the discharge communication hole to the end portion 119b. Therefore, the piston 130 accommodated in the cylinder hole is gradually lowered in accordance with the inclination of the cam member as the rotating member rotates. Accordingly, the fluid stored in the communication space A is ejected at a high pressure through the discharge communication hole 119 by the pressure difference.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

The present invention can be applied to a fluid pump that discharges the fluid at high pressure or requires durability of the pump.

Claims

A pumping housing including an inlet part through which fluid is introduced, a discharge part through which pumped fluid is discharged, and an accommodation part interposed between the inlet part and the discharge part;

A rotating member that is tightly received in an accommodating part of the pumping housing and has a plurality of cylinder holes communicating with the inlet part and the outlet part in order as the part is rotated;

A plurality of pistons inserted into the cylinder holes of the rotating member so that the rotating member can have a communication space communicating with the pumping housing;

A cam member for controlling the piston to move up and down the plurality of pistons so that the volume of the communication space communicating with the inlet is increased while the rotating member is rotated, and the volume of the communication space communicating with the outlet is gradually reduced; And

And a rotating means for rotating the rotating member.
The method of claim 1,

An inflow communication hole and a discharge communication hole are formed at the bottom of the accommodating part of the pumping housing so as to face each other with respect to the center of the accommodating part and communicate with at least one cylinder hole.

The inlet of the pumping housing includes an inlet formed on one side of the pumping housing and an inlet passage passing between the inlet and the inlet communication hole,

The discharge part of the pumping housing, the fluid pump characterized in that it comprises an outlet formed in the other side of the pumping housing and the discharge passage passing between the discharge port and the discharge communication hole.
The method of claim 1,

Each of the pistons is formed with a groove for the cam formed along the circumference,

The cam member is fitted to each of the cam grooves of the piston, coupled to the rotating member inclined so that the piston is raised and lowered in accordance with the height of the cam member.
The method of claim 3,

And the cam member has a hollow disk shape in which a portion corresponding to the inflow portion is inclined toward a higher side, and a portion corresponding to the discharge portion is inclined toward a lower side.
The method of claim 1,

And the respective cylinder holes do not communicate with each other.
A fluid pumping method of a fluid pump having the structure of claim 1,

Arranging at least one of the cylinder holes disposed in the rotating member to communicate with a start of the inflow communication hole of the pumping housing;

Raising the piston accommodated in the cylinder hole in accordance with the inclination of the cam member while rotating the piston from the beginning to the end of the inflow communication hole;

Rotating the rotary member to position the piston at a start position of the discharge communication hole; And

Lowering the piston accommodated in the cylinder hole in accordance with the inclination of the cam member while rotating the piston from the beginning to the end of the discharge communication hole;

Fluid pumping method of a fluid pump comprising a.